22S28

22S28 Brush DC Coreless Motor

22S28

With its Alnico magnet, the 22S28 brush DC motor offers a good price-to-performance ratio for a very small package size. It can provide up to 4 mNm continuously, and operates at up to 80% efficiency with a long life.

Product Highlights

  • Ironless construction
  • Alnico magnet for high performance
  • High power density package
  • Precious metal commutation
  • Long brush life
  • Compact design
  • Winding possibilities
  • REE windings to reduce electro erosion

Customization Available

  • Cable or terminal outputs
  • Coil modifications - resistance and inductance
  • Custom shafts - flats, knurling, diameter, length
  • Fixation holes
  • Sleeve or ball bearings

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Part Number 22S28 205E.1 22S28 208E.1
Motor Diameter (in) 0.866 0.866
Motor Diameter (mm) 22 22
Shaft Play - Axial (in) 0.0059 0.0059
Shaft Play - Axial (mm) 0.15 0.15
Shaft Play - Radial (in) 0.0012 0.0012
Shaft Play - Radial (mm) <0.03 <0.03
Back EMF Constant (V/1000 rpm) 2.97 1.54
Continuous Current, Max (A) 0.15 0.29
Continuous Torque, Max (mNm) 3.9 4.1
Continuous Torque, Max (oz-in) 0.55 0.58
Mechanical Time Constant (ms) 25.5 25.6
Motor Regulation (10³/Nms) 170 160
No-Load Current, Typical (mA) 2.8 6
No-Load Speed (rpm) 7940 9600
Nominal Voltage (V) 24 15
Rotor Inertia (gcm²) 1.5 1.6
Rotor Inertia (oz-in-sec² 10ˉ⁶) 21.234 22.65
Torque Constant (mNm/A) 28.4 14.7
Torque Constant (oz-in/A) 4.02 2.08
Weight (g) 49 49
Weight (oz) 1.73 1.73
Ambient Operating Temperature, Max: Rotor (°C) 100 100
Ambient Operating Temperature, Max: Rotor (°F) 212 212
Ambient Operating Temperature Range: Motor (°C) -30 to 85 -30 to 85
Ambient Operating Temperature Range: Motor (°F) -22 to 185 -22 to 185
Continuous Speed, Max (rpm) 10000 10000
Efficiency (%) 76 78
Friction Torque (mNm) 0.08 0.09
Friction Torque (oz-in) 0.011 0.013
Output Power (W) 2.4 2.5
Rotor Inductance (mH) 3.6 0.92
Shaft Load, Max - Axial (5 mm. from bearing) (N) 1.5 1.5
Shaft Load, Max - Axial (5 mm. from bearing) (oz) 5.4 5.4
Shaft Load, Max - Radial (5 mm. from bearing) (N) 100 100
Shaft Load, Max - Radial (5 mm. from bearing) (oz) 359.6 359.6
Stall Torque at Nominal Voltage (mNm) 4.9 6.3
Stall Torque at Nominal Voltage (oz-in) 0.69 0.89
Terminal Resistance (Ohm) 140 35
Thermal Resistance (rotor/body) (°C/W) 5 / 30 5 / 30
Thermal Time Constant (rotor/stator) (s) 5 / 480 5 / 480
Document Document Type Language File Type
22S28 Specification Page Specification Page
22S28 drawing 2D Drawing
22S28 3D drawing 3D Drawing
Portescap MotionCompass: Guide to Interactive Motor Selection (brochure) Brochure